He has represented Great Britain at eight Summer Paralympics winning nine Gold, one Silver and three Bronze medals across swimming and cycling events.

[4] On 12 October 2012, Cundy was awarded an Honorary Doctorate from Anglia Ruskin University with a ceremony at the Cambridge Corn Exchange.

[2] After become a leading member of his local King's Lynn club's team, he made his international debut at the Swimming World Championships in Malta in 1994.

He later represented Great Britain three times in swimming at the Paralympic Games from 1996 to 2004, winning three gold and two bronze medals.

[7] After a 2004 Athens Paralympic Games that landed him a bronze medal, Cundy joined the high-performance swimming centre at Swansea.

Winning gold in the kilo in his debut at the 2006 world championships, he repeated this feat in 2007 and 2009 also taking the team sprint title at both events.

[10] Cundy aimed to qualify for the England team for the 2014 Commonwealth Games, but he abandoned this hope after placing fifth among English competitors and eighth overall in the 1km time trial at the 2013 British National Track Championships, despite setting a new personal best and a world record for the C4 category.

[16] At the 2020 Paralympic games in Tokyo, he took home the Silver in the C4-5 1 km Time Trial behind Spanish C5 Athlete Alfonso Cabello.